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SubjectRe: [PATCH net] vhost: correctly check the return value of translate_desc() in log_used()
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From: Jason Wang <jasowang@redhat.com>
Date: Fri, 15 Feb 2019 15:53:24 +0800

> When fail, translate_desc() returns negative value, otherwise the
> number of iovs. So we should fail when the return value is negative
> instead of a blindly check against zero.
>
> Reported-by: Stephen Hemminger <stephen@networkplumber.org>
> Fixes: cc5e71075947 ("vhost: log dirty page correctly")
> Signed-off-by: Jason Wang <jasowang@redhat.com>

Jason, please put the Fixes tag first.

Thank you.

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